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View Full Version : Start up A/F's



slowhawk
August 19th, 2007, 09:16 AM
Seams pretty common when I tune in a COS3 with open loop on hot starts the A/F is lean and takes a few minutes to go back to the commanded/tuned 14.5-1. I'm talking sometimes it is 17-1A/F. Is there a table that can be adjusted to richen hot starts?

Chevy366
August 19th, 2007, 03:07 PM
The tables [A0008] and [A0014] are for start up trims of AFR , in COS3 .
Do a search on here for both and there is a lot of info .
Saw the same thing and those tables cured the problem .

slowhawk
August 19th, 2007, 11:47 PM
The tables [A0008] and [A0014] are for start up trims of AFR , in COS3 .
Do a search on here for both and there is a lot of info .
Saw the same thing and those tables cured the problem .

Those are for weather conditions.The problem I have is that the vehicles start lean no matter what condition (hot/cold)then take a few minute's to fall back to the tuned settings. Figured there might be a start table that can add fuel.

It's really not a big deal since the vehicles run great,just bothers me.

onfire
August 21st, 2007, 02:29 PM
b3632 will work...plus it has a decay rate.

onfire
August 21st, 2007, 02:40 PM
b3661 also works